<template>
  <div>
    <div class="search">
      <input
        v-model="keyword"
        class="search-input"
        type="text"
        placeholder="输入城市名或拼音"
      >
    </div>
    <div
      class="search-content"
      ref="search"
      v-show="keyword"
    >
      <ul>
        <li
          class="search-item border-bottom"
          v-for="item in list"
          :key="item.id"
          @click="handleCityClick(item.name)"
        >
          {{item.name}}
        </li>
        <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
      </ul>
    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  import {mapMutations} from 'vuex'

  export default {
    props: {
      cities: Object
    },
    data() {
      return {
        keyword: '',
        list: [],
        timer: null,
      }
    },
    computed: {
      hasNoData() {
        return !this.list.length
      }
    },
    methods: {
      handleCityClick(city) {
        this.changeCity(city)
        this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
    },
    watch: {
      keyword() {
        if (this.timer) {
          clearTimeout(this.timer)
        }
        if (!this.keyword) {
          this.list = []
          return
        }
        this.timer = setTimeout(() => {
          const result = []
          for (let i in this.cities) {
            this.cities[i].forEach((value) => {
              if (value.spell.indexOf(this.keyword) > -1 ||
                value.name.indexOf(this.keyword) > -1) {
                result.push(value)
              }
            })
          }
          this.list = result
        }, 100)
      }
    },
    mounted() {
      this.scroll = new Bscroll(this.$refs.search)
    }
  }
</script>

<style scoped lang="stylus" type="text/stylus">
  @import "~styles/varibles.styl"
  .search
    height .72rem
    padding 0 .1rem
    background $bgColor
    .search-input
      box-sizing border-box
      line-height .62rem
      width 100%
      text-align center
      border-radius .06rem
      color: #666
      padding 0 .1rem
      height .62rem

  .search-content
    z-index 1
    overflow hidden
    background #eee
    position absolute
    top 1.58rem
    right 0
    bottom 0
    left 0
    .search-item
      line-height .62rem
      padding-left .2rem
      background #fff
      color: #666
</style>
